Educational content for trained professionals. Not a Safety Data Sheet, not medical advice. In an emergency, call your local poison control or emergency services immediately. Terms of use.
SODIUM HYDROXIDE
Also known as: SODIUM HYDROXIDE · 1310-73-2 · Caustic soda · Sodium hydrate
- CAS No.
- 1310-73-2
- Formula
- HNaO
- Molar mass
- 39.997 g/mol
- PubChem CID
- 14798
Corrosive
Harmful / Irritant
Health hazard
Summary
Sodium hydroxide is an alkali metal hydroxide.
Background
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Hazards
Attacks skin, eyes and materials.
May cause skin, eye or respiratory irritation.
Serious long-term health effects (CMR, respiratory sensitizer).
Hazard statements
- H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
- H290
- H315
- H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
- H319
- H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
- H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure
Storage
Keep at room temperature, below 30 °C, out of direct heat.
Store somewhere well-ventilated and away from any ignition source.
Metal drums or tinted glass, tightly sealed.
Strong acids, strong bases and powerful oxidizers.
Personal protective equipment
Nitrile or butyl, at least 0.4 mm thick.
Safety goggles with side shields.
A2 organic-vapor cartridge if the room isn't well ventilated.
Occupational exposure limits (HSE)
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EU harmonised classification (ECHA C&L)
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Transport
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FDA recalls & enforcement
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Compatibilities
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Open comparator with SODIUM HYDROXIDEPractical safety notes
- Corrosive. Wear chemical goggles, faceshield and chemical-resistant gloves. Have an eyewash within reach.
- Irritant / harmful. Ventilate the workspace and avoid skin contact.
- Serious health hazard (carcinogen, mutagen, reprotoxic, respiratory sensitizer). Substitute if possible; otherwise closed systems and medical surveillance.
Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.
FAQ
Is SODIUM HYDROXIDE flammable?+
SODIUM HYDROXIDE (CAS 1310-73-2) does not carry the GHS02 flame pictogram in our records. Always confirm with the manufacturer's SDS section 9 (flash point) before assuming a product is non-flammable.
What PPE should I wear when handling SODIUM HYDROXIDE?+
Chemical-splash goggles and a faceshield, chemical-resistant gloves (nitrile or butyl) and an apron are the minimum. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.
How should SODIUM HYDROXIDE be stored?+
Store SODIUM HYDROXIDE (CAS 1310-73-2) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials. Segregate acids from bases and keep away from metals that can be attacked.
Is SODIUM HYDROXIDE dangerous for the environment?+
No specific environmental pictogram (GHS09) is listed in our records for SODIUM HYDROXIDE, but any chemical waste should be handled through your site's hazardous-waste procedure, not poured down the drain.
Where can I find the official Safety Data Sheet for SODIUM HYDROXIDE?+
Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.
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